Carbureter.



J, DAYTON; GARBURETER. APPLIUATIONTILED NOV. 2, 1909.

1,016,251, Patgn ted Feb. 6, 1912.

UNITED STATES PATENT onnron.

JAMES M. DAYTON, OF'TOBBINGTON, CONNECTICUT, ASSIGNOB TO EXCELSIOBNEEDLE COMPANY, OF 'IOBBINGTON, CONNECTICUT, A CORPORATION OFCONNECTICUT."

CARBURETER.

Specification of Letters latent.

Patented Feb; 6,1912.

Application.filediiovember 2, 1909. Serial N0. 525,942.

valves for controlling the supply to the float.

chamber, and the valve for controlling the supply to the mixing chamber;also the relation of these parts to the float chamber and" also to theconstruction of the float chamber.

An object of the invention is to provide a durable means for connecting.the float to the valve stemandto generally improve the arrangement' ofparts and the efliciency of the carbureter;

In thedrawings which show by way of illustration one embodiment of theinvention,--Figure: 1 is a sectional view through the carbureter with myimprovements ap pliedthereto; Fi 2 is a section on theline 22 of Fig. 1;Fig.3 is a detail of the lower,

part-of the main casing, with the bowl forming the float chamberremoved; and Fig; 4 is adetail in cross section of the float, showingits connection to the supply'valve.

My improved carbureter: comprises a main casing 1, which as herein shownis cast in a single, piece and has a main air opening 2, anauxiliary airinlet opening 3, and an outlet- 4 leadingto the motor, which is controlledby: a throttle valve 5 of the usualconstruction. v

The auxiliary air inlet opening 3 is controlled by a valve 6' attachedtoa valve rod 7,"which.in turn is controlled by a spring mounted in asupporting casing 8, carried by the main casing 1- of the carbureter.This auxiliary air inletavalve and its controlling mechanism form nopart of the present invention,- but are shown, described and olaimedinmy applicationfiled of even date herewith, Serial Number 525,941.

The main casing-1 between the .main air inlet 2 andxtheauxiliary airinlet, is deflected downwardly, forming a U-shaped .pas-

sage 9, through which the air is drawn by the suction of the engine. Atthe lower portion of the U-shaped passage 9i's an upwardly projectingnozzle 10, which: supplies the gasolene or other liquid fuel to thecarbureter. Said nozzle is controlled by the needle ,valve 11 mountedin. suitable bearings formed in the main casing 1. The main. casing 1belowthe nozzle 10has a downwardly projecting sleeve 12 formed with ashoulder 13.v The main casing 1 is also provided with a laterallyprojectin disk 14, which forms the cover or top 0 the float chamber.

A bo'wl 15 which is preferably of spun brass, has a central openingwhich fits on to the sleeve 12, so that the said bowl rests againsttheflange 13. When the bowl is seated against the flange 13, the upperedge thereof engages the disk or .top- 14, so thatv thechamber istightly closed. A nut 16 threaded on the sleeve 12,'serves to hold thebowl in its proper position.

.A float 17 is arranged within the float chamber, formed bythe bowl 15,and said float may be of any. desired construction. As herein shown,said float is provided with a central opening, which surrounds thesleeve 12, and which is considerably larger indiameter than said sleeve.At the loweredge of the central opening through the float is an inwardlyprojecting flange 18.

The sleeve 12 has a cut away portion or recess 19, which extendstransversely through the sleeve, opening at each end into the floatchamber.- Said'sleeve 'also has a vertical opening 20 extending from therecess 19 downwardly. The sleeve 12 at its lower end is connected withthe gasolene or liquid fuel supply,-- and the rfuel passes through. theopening 20 and the'recess 19 into the float chamber.

.As a means for controlling the supply-of gasolene or liquid fuel, Ihave provided a valve 21 which engages a valve seat 22 formed in thesleeve 12 by contracting the opening 20 leading centrally therethrongh.The stem 23 is, of course, slightly smaller than the opening 20 at thepoint where said valve ,stemextends through the same, and said valvestem extends upwardly across the recess 19 into. a guidingway in theupper: portion of the sleeve 12'. Said valve stem 23 intermediate itsends is threaded into a boss 24:, which may be formed integral with thecross bar 25. Said cross bar 25 extendsthrough the -recess 19, and isbolted or se- 5 cured in any other desirable way to the flange 18 on thefloat 17 It will readily be seen that as the float 17 moves up and down,

2 0 float, said valve stem may be turned into or out of said'threadedboss, thus changing the relative position-of the valve and the float.The threaded boss may be split either horizontally' .or vertically, andwill serve as a .25 friction means for preventing accidental turning ofthe valve stem relative to the float. When it is desired to increase thefrictional grip of the boss, the parts may be slightly pressed together,so as to change the normal inclination of the parts of said bossrelative to each other, and thus increase the frictional grip of thesame on the valve stem. It will thus be seen that I have provided aready means for adjusting the supply valve,

without in any way disturbing the assembled carbureten.

In order that the float chamber may be readily accessible forinspection, I have provided said chamber with an opening 26,

4,0 which is formed in the top or cover 14:.

Said openihg may be closed in anysuitable way, and, as hereinshown, Ihave provided a screw cap whirh may be readily removed in order thataccess to. the chamber may be had; If it is desired to flood the chamberat.any time, all-that is necessary is to remove the cap, and byinserting the 'finger the float maybe depressed and the chamber It isessential to. determine with certainty the normal height of the liquidin the float chamber, and to ascertain if from any cause the fluidlevelis above or below thenormal height. In order that this may be readilydetermined, I have provided a-gage pin 27,

which as herein shown is secured to the main casing of the carburetor ata point as near the supply nozzle of the carburetor as possible. Saidgage pin projects into the float chamber, and may be made of celluloid,if

desired, so that it may be readily seen when .the screw; cap 26 'isremoved. By placing .the age pin as -near as possible to the fuel nozze, the proper level of the liquid fuel may be determined, although thecarbureter by. reason of its attachment to a machine may be tilted outof normal posltion. The

fuel passes from the float chamber through 'an inclined opening 28formed in the main =casing,'which opening leads to the nozzle 10.

A draining hole 32 is formed longitudinally through the sleeve 12, andextends into the lower portion of the V-shaped passage in the maincasing. An outlet hole 33 extends from the hole 32 to the outer surfaceof the sleeve, preferably at a point just below the nut 16. The lowerend of the hole 32 will be closed by the connection to the supply pipe.This hole and outlet serve for draining excess liquid fuel from themixing chamber, should the valve fail'to seat.

Having thus particularly described my invention, what I claim as new anddesire to secure by 'Letters Patent, is:

1, A carbureter including in combination, a main casing having an airpassage therethrough, a downwardly projecting sleeve carried by saidmain casing having an opening extendin centrally through the sleeve, afloat cham er surrounding said sleeve, a valve for controlling thefuel.supplied to the float chamber, said valve having a stem slidingin theopening in said sleeve, a fueldelivering nozzle directly above saidsleeye and projecting into said air passage, said sleeve having anopening leading from the central opening to the float chamber, and aneedle valve for controlling the supply from said nozzle.

2. A carbureter including in combination, a main casing having aU-shaped air passage, a downwardly projecting sleeve carried by saidmain casing and havmg an opening extending therethrough, a float chamberconnected to said sleeve and surrounding the same, a valve forcontrolling the fuel supplied to the float chamber, said valve having astem sliding in the opening in said sleeve, a fuel-delivering nozzl.edirectly above said sleeve and projecting into said U-shaped ,airpassage, said sleeve haying an inclined opening extending from saidcentral openin to the float chamber and connecting wit 1 said centralopening vadj acent the nozzle, and a needle valve for controlling thesupply from said nozzle.

3. A carbureter including in combination a main casing having an airpassage therethrough, a downwardly projecting sleeve, a supply valvelocated in said sleeve, a float surrounding said sleeve, said sleevehaving a transverse opening therethrough, across which the stem of thevalve extends, a cross bar extending through said opening and attachedto saidfloat, said cross bar having a threaded connection with the stemof said valve and a fuel delivering nozzle in line with said sleeve andprpjecting into said air passage, said fuel delivering nozzle and saidsleeve having an opening leading to the float chamber.

ll A carbureter including incombination, a main casing having an airpassage therethrough, a downwardly projecting sleeve, a supply valvelocated in said sleeve, a float surrounding said sleeve, said sleevehaving a transverse opening therethrough, across which the stemof'thevalve extends, a cross bar extending through said opening andattached to said float, a threaded boss formed on said cross bar intowhich the stem of the valve is threaded and a fuel delivering nozzleinline with said sleeve and. projecting into said air passage, said fueldelivering nozzle and said sleeve having an opening leading to thefioatchamber.

5. A carbureter including in combination, a main casing having an airpassage therethrough, a float chamber, a fuel nozzle having a passageleading to said'fioatchamber, a float having a central openingtherethrough, "an inwardly projecting flange carried by-said float, across bar secured to said flange, a horizontally split nut mounted onthe cross bar, a valve for controllin the supply to the float chamber,tha stem 0 said valve being threaded into sald split nut,

whereby the same may be adjusted and friotionally held in adjustedposition.

6. A carbureter including in combination, a main casing having aU-shaped portion through which the air passes, a downwardly projectingsleeve formed in said casing at the lower portion of'said' U-shapedpart,

said sleeve having a central opening therethrough, and a transverseopening leading from said central opening into the float chamber, a bowlsecured to said sleeve, a cover for the bowl secured to said casing, a

floatlocated in said bowl, a valve located in the opening in saidsleeve, and connected to said float, an upwardly projecting nozzleformed in said air passage at the lower portion of said U-shaped part,said sleeve having an inclined opening for connecting said nozzle tosaid float chamber, and a needle valve for controlling the supply offuel from said nozzle.

In testimony whereof I aflix my signature. in presence of two witnesses.

JAMES M. DAYTON.

Witnesses DENNIS HILDRETH, GHAs. M. HIBBARD.

